JP6534629B2 - Damper device and fixture - Google Patents

Description

  The present invention relates to a damper device that controls the moving speed of a moving body.

  DESCRIPTION OF RELATED ART Conventionally, the technique of the damper apparatus which attenuates the moving speed of moving bodies, such as a door, is known. For example, Patent Document 1 and Patent Document 2 disclose this type of technology.

  In Patent Document 1, when the door is in a specific half-open position, a half-open position regulation single projection is positioned in the middle of the half-open position regulation pair projections, and the door is half-opened regardless of whether it is opened or closed from the specific half-open position. A door check device is described in which the radial distance between the position limiting pair projection and the half opening position limiting projection is reduced.

  Patent Document 2 has the following description about a technique related to a hinge (a hinge in Patent Document 2). That is, the plurality of magnets of the cylindrical member are alternately disposed at the N pole and the S pole alternately at equal angles about the central axis along the circumferential direction of the inner surface of the cylindrical body. The shaft member is inserted into the interior of the cylindrical member so as to be rotatable relative to the cylindrical member about the central axis. A plurality of magnets of the shaft member are alternately arranged with N poles or S poles offset at equal angles around the central axis along the rotation direction of the outer surface of the shaft body so as to face each magnet of the cylindrical member . When the door is closed, the polar arrangement of the magnets of the shaft member is offset by a predetermined angle about the polar arrangement of the magnets of the cylindrical member and the central axis.

JP, 2005-264616, A JP, 2008-111291, A

  Any of the techniques disclosed in Patent Document 1 and Patent Document 2 attenuates the rotation of the door as the moving object at a specific position, and attenuates the moving speed of the moving object at a position deviated from the specific position. I could not Further, since the damping force to be applied to the movable body such as a door differs depending on the position and the moving direction, there is room for improvement in adjusting the damping force according to the movement of the movable body.

  An object of the present invention is to provide a damper device and a fitting that can appropriately adjust a damping force to be applied according to the moving direction and the moving position of a moving body.

  The present invention is a damper device (e.g., a door closer 5 and a hinge 11 described below) that controls the moving speed of a moving body (e.g., the door 1 described below), and a rotating shaft that rotates in conjunction with the movement of the moving body (For example, a rotation shaft 15 described later) and a magnetic fluid (for example, a magnetorheological fluid 51 described later) having a property of changing viscosity according to a magnetic field, and the rotation of the rotation shaft or the rotation shaft A magnetic fluid portion (for example, a magnetic fluid portion 50 described later) in which a driven resistance portion is rotatably inserted, and a magnet (for example, magnets 71 271 371 described below) that increases the viscosity of the magnetic fluid by a magnetic field A magnetic shielding portion (for example, a magnetic shielding portion 62 described later) disposed between the magnetic fluid portion and the magnet and shielding magnetism and a magnetic passing portion (for example, a slit 61 described later) for transmitting magnetism are of the rotating shaft. rotation A rotating member (e.g., a magnetic field shield (e.g., a magnetic field shield 60 described later) formed side by side in a rotational direction and rotating in conjunction with the rotation axis to change the positional relationship between the magnet and the magnetic passing portion in the rotation direction) And a rotating member 20) described later. Here, the positional relationship includes the direction of the magnet.

  The magnetic passage portion is preferably formed to be larger or smaller as its area or thickness goes in the rotational direction.

  The present invention relates to a fixture (for example, a door (for example, a door 1 described later) attached to an opening of a building and a damper device (for example, a door closer 5 or a hinge 11 described below) for controlling the moving speed of the door. And the damper device has a property that the viscosity changes according to the magnetic field and the rotation shaft (for example, the rotation shaft 15 described later) that rotates in conjunction with the movement of the movable body. A magnetic fluid portion (for example, a magnetic fluid portion described later, which is filled with a magnetic fluid (for example, the magnetic viscosity fluid 51 described later) and in which a resistance portion driven by the rotation of the rotation shaft or the rotation shaft is rotatably inserted. 50) a magnet that increases the viscosity of the magnetic fluid by a magnetic field (for example, magnets 71, 271, and 371, which will be described later), a magnetic shield that is disposed between the magnetic fluid portion and the magnet and blocks magnetism (for example, A magnetic field shield (for example, a magnetic field shield 60 described later), in which a magnetic shielding portion 62) described later and a magnetic passing portion (for example, a slit 61 described later) for passing magnetism are formed side by side in the rotational direction of the rotation shaft The present invention relates to a fixture including a rotating member (for example, a rotating member 20 described later) which rotates in conjunction with an axis and changes the positional relationship between the magnet and the magnetic passing portion in a rotating direction.

  According to the present invention, it is possible to provide a damper device and a fitting that can appropriately adjust the damping force to be applied according to the moving direction and the moving position of the moving body.

It is a front view of a fitting in which a door closer concerning an embodiment of the present invention is used. It is a figure which shows typically the structure of the reaction part of 1st Embodiment. It is a schematic diagram which shows the positional relationship of the magnet which changes with rotation of a rotating shaft, and a slit by planar view. It is a figure which shows typically the structure of the reaction part of 2nd Embodiment. It is a figure which shows typically the structure of the reaction part of 3rd Embodiment. It is a figure which shows the magnetic field shield of 4th Embodiment. It is a figure which shows the example which applied the damper apparatus of this embodiment to the hinge.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

First Embodiment
FIG. 1 is a front view of a fixture 4 in which a door closer 5 according to an embodiment of the present invention is used. The fitting 4 includes a frame 2 fixed to the opening of the building, a door 1 as a door, a plurality of hinges 11 rotatably supporting the door 1, and a door closer 5 for controlling the moving speed of the door 1 And.

  As shown in FIG. 1, the door closer 5 used for the fitting 4 includes a main body 6 rotatably supporting a rotary shaft 15, an arm portion 16 connected to the main body 6 via the rotary shaft 15, and an arm portion 16. And a link mechanism 17 for connecting the frame 2 (or the building side). The rotation shaft 15 is interlocked with the rotation of the door 1 by the arm portion 16 and the link mechanism 17.

  The door closer 5 is provided therein with a drag portion 10 that attenuates the rotational force of the rotary shaft 15, and the drag portion 10 controls the rotational speed of the door 1 which is a moving body.

  FIG. 2: is a figure which shows typically the structure of the reaction part 10 of 1st Embodiment. FIG. 3 is a schematic view showing in plan view the positional relationship between the magnet 71 (magnets 71 a to 71 d) and the slit 61 which change with the rotation of the rotation shaft 15.

  As shown in FIG. 2, the reaction part 10 includes a main body 6 as an exterior for supporting each component, a magnetic fluid part 50 disposed inside the main body 6, a magnetic field shield 60 for shielding a magnetic field, and a rotating shaft 15. And a magnet 71 supported by the rotating member.

  The magnetic fluid unit 50 includes a magnetorheological fluid 51 whose viscosity is changed by a magnetic field, and a magnetorheological fluid tank 52 which is a container filled with the magnetorheological fluid 51.

  The magnetic fluid reservoir 52 is formed of a material capable of passing a magnetic field. In this embodiment, it is configured as a cylindrical member in which a space for filling the magnetorheological fluid 51 is formed.

  In the magnetic fluid tank 52, the end opposite to the side to which the arm portion 16 of the rotating shaft 15 is connected is inserted. At the end of the rotary shaft 15 to be inserted into the magnetic fluid tank 52, a stirring fin 19 as a resistance portion is provided. As the rotation shaft 15 rotates, the stirring fins 19 receive resistance according to the viscosity of the magnetorheological fluid 51.

  The magnetic field shield 60 has a cylindrical shape whose upper and lower sides are open, and is disposed so as to surround the circumferential surface of the magnetic fluid tank 52.

  A slit 61 as a magnetic passage portion is formed on the circumferential surface of the magnetic field shield 60. As shown in FIG. 3, the slits 61 of the magnetic field shield 60 are formed at a plurality of locations in the rotational direction. In the present embodiment, two slits 61 are disposed at an interval of about 90 degrees.

  The portion of the circumferential surface of the magnetic field shield 60 where the slits 61 are not formed functions as a magnetic shielding portion 62 formed of a material that does not allow the magnetic field to pass (a material that is difficult to pass). That is, on the circumferential surface of the magnetic field shield 60, the magnetic shielding portion 62 for shielding the magnetic field and the slits 61 for passing the magnetic field are aligned in the rotational direction.

  The rotating member 20 is a ring-shaped member that supports the magnet 71 and is fixed to the rotating shaft 15. The rotating member 20 rotates integrally when the rotating shaft 15 rotates, and changes the position of the magnet 71.

  The magnet 71 is a permanent magnet composed of an S pole and an N pole which changes the viscosity by applying a magnetic field to the magnetorheological fluid 51, and a plurality of magnets 71 are arranged on the rotating member 20.

  In the present embodiment, the four magnets 71a to 71d are fixed to the rotating member 20 at equal intervals (90-degree intervals) in the rotational direction. The magnet 71a and the magnet 71c have an N pole located on the rotation center side, and the magnet 71b and the magnet 71d have an S pole located on the rotation center side. That is, the directions of the S pole and the N pole are alternately set by the adjacent magnets 71 a to 71 d on the rotating member 20.

  Next, the positional relationship between the slit 61 and the magnets 71a to 71d, which changes with the rotation of the rotation shaft 15, will be described. In the following description, the state of FIG. 3A is referred to as a reference position (0 degree) for the sake of convenience.

  In the state shown in FIG. 3A, all of the surfaces on the rotation center side of the magnets 71a to 71d are out of the position where the slit 61 of the magnetic field shield 60 is formed. In this example, the magnets 71a to 71d are located at a position shifted 45 degrees from the position of the slit 61. In this state, even if the magnetic field generated by the magnets 71a to 71d does not act on or acts on the magnetorheological fluid 51 of the magnetic fluid unit 50, the influence is small. Therefore, the damping force acting on the door 1 is relatively small.

  FIG. 3 (B) shows a state in which the rotation shaft 15 is rotated 45 degrees clockwise from the state of FIG. 3 (A). In the state shown in FIG. 3 (B), the S pole of the magnet 71 b and the N pole of the magnet 71 c are positioned so as to overlap the slit 61 in the radial direction. As shown by the broken arrow in FIG. 3B, magnetic lines of force communicate between the S pole of the magnet 71b and the N pole of the magnet 71c, and a strong magnetic field acts on the magnetorheological fluid 51 of the magnetic fluid unit 50. Due to the strong action of the magnetic field, the viscosity of the magnetorheological fluid 51 also increases, and the resistance to which the stirring fin 19 is subjected is also the largest. That is, the damping force acting on the door 1 is the largest.

  FIG.3 (C) shows the state which the rotating shaft 15 rotated 90 degree right from the state of FIG. 3 (A). In the state shown in FIG. 3C, as in FIG. 3A, all the surfaces on the rotation center side of the magnets 71a to 71d are out of the position where the slit 61 of the magnetic field shield 60 is formed. Also in the state shown in FIG. 3C, the damping force acting on the door 1 is relatively small.

  As shown in FIGS. 3A to 3C, the magnets 71a to 71d are rotationally moved with the rotation of the rotary shaft 15, and the position of the slit 61 is changed to change the position of the door 1 to a predetermined value. A configuration is realized in which the magnetic field is strongly applied when in position to increase the damping force on the door 1.

According to the door closer 5 of the first embodiment described above, the following effects can be obtained.
The door closer 5 as a damper device is filled with a rotation shaft 15 that rotates in conjunction with the movement of the door 1 and a magnetorheological fluid 51 having a property that the viscosity changes according to the magnetic field. The stirring fins 19 to be driven are disposed between the magnetic fluid portion 50 to which the magnetic fluid portion 50 is rotatably inserted, the magnets 71a to 71d for increasing the viscosity of the magnetorheological fluid 51 by the magnetic field, and the magnetic fluid portion 50 and the magnets 71a to d, A magnetic shield 60 for shielding the magnetism and a slit 61 for passing the magnet are formed in line in the rotational direction of the rotary shaft 15, and rotate in conjunction with the rotary shaft 15. The position of the magnets 71a to 71d and the slit 61 And a rotating member 20 for changing the relationship in the rotational direction.

  Thereby, the damping force to the rotation of the door 1 can be adjusted by the position of the slit 61. For example, since the rotation range of the moving body such as the door 1 is predetermined, the drag applied to the opening start or closing start of the door 1 is reduced by adjusting the position and the shape of the slit 61 in the rotation direction. On the other hand, when the door 1 is located at the center of the rotation range, the damping force can be made to be large.

  Further, by applying the door closer 5 as the damper device of the present embodiment to the fitting 4, even if unintended pivoting of the door 1 such as wind wind occurs, the damping force is adjusted according to the pivoting direction of the door 1. It can act properly.

  Next, second to fourth embodiments in which the present invention is applied to a door closer as in the first embodiment will be sequentially described. In the following description of each embodiment, the same reference numerals are given to the same configuration as described above, and the description may be omitted.

Second Embodiment
FIG. 4 is a view schematically showing the configuration of the drag unit 210 of the second embodiment. As shown in FIG. 4, the drag portion 210 of the second embodiment differs from the first embodiment in the configuration in which the positional relationship between the magnet 271 and the slit 261 is changed in the rotational direction.

  The magnetic field shield 260 according to the second embodiment is formed in a cylindrical shape surrounding the magnetic fluid portion 50, and a plurality of slits 261 are formed on the circumferential surface thereof. The portion other than the portion where the slit 261 is formed on the circumferential surface of the magnetic field shield 260 functions as the magnetic shielding portion 262. The positional relationship between the slits 261 is the same as that of the first embodiment.

  In the second embodiment, the magnetic field shield 260 is connected to the rotating shaft 15 via the rotating member 220. In the present embodiment, the rotating member 220 and the magnetic field shield 260 are an integral member, and the rotating member 220 and the magnetic field shield 260 integrally rotate with the rotation of the rotating shaft 15. Therefore, the slit 261 formed in the magnetic field shield 260 rotates and moves at that position as the rotation shaft 15 rotates.

  A plurality of magnets 271 of the second embodiment are fixed to the bottom of the main body 6. For example, four magnets 271 are arranged at equal intervals (90 degrees intervals) on the same circumference, and the height thereof corresponds to the height of the slit 261 formed in the magnetic field shield 260. Also in the second embodiment, the magnets 271 adjacent to each other on the same circumference are alternately arranged such that the poles facing the center become the S pole and the N pole.

  Also in the drag portion 210 of the second embodiment described above, when the rotary shaft 15 rotates, the magnetic field shield 260 is rotated, and the position of the slit 261 as the magnetic passing portion changes the position with respect to the magnet 271. . Also in this configuration, by adjusting the position of the slit 261, the magnetic field acting on the magnetorheological fluid 51 of the magnetic fluid portion 50 can be strengthened or weakened at a specific position, and the damping applied to the door 1 The force can be adjusted appropriately according to the position of the door 1.

Third Embodiment
FIG. 5: is a figure which shows typically the structure of the reaction force part 310 of 3rd Embodiment. As shown in FIG. 5, the reaction force unit 310 of the third embodiment includes a main body 6 as an exterior for supporting each component, a magnetic fluid unit 350 disposed inside the main body 6, and a magnetic field shield 360 for shielding a magnetic field. And a rotating member 320 interlocked with the rotating shaft 15, and a magnet 371 supported by the rotating member 320.

  The magnetic fluid unit 350 includes a magnetorheological fluid 351 and a magnetorheological fluid reservoir 352 filled with the magnetorheological fluid 351.

  The magnetic fluid tank 352 of the third embodiment has a cylindrical outer shape. An annular filling groove 353 is formed in the magnetic fluid reservoir 352 along the end face. The filling groove 353 is a groove having a predetermined depth formed over one round. The filling groove 353 is filled with the magnetorheological fluid 351.

  The magnetic field shield 360 is disposed inside the magnetic fluid reservoir 352. The magnetic field shield 360 is also formed in a cylindrical shape, and a plurality of slits 361 as magnetic passing portions are formed on the circumferential surface thereof. A portion other than the portion where the slits 361 are formed in the circumferential surface of the magnetic field shield 360 functions as the magnetic shielding portion 362. The positional relationship between the slits 361 is the same as that in the first embodiment.

  The rotation member 320 is formed by extending the rotation shaft 15 in the downward direction, and is a member integral with the rotation shaft 15. The magnet 371 is fixed to the lower end of the rotating member 320.

  The magnet 371 is a permanent magnet in which an N pole and an S pole are arranged side by side in the rotational direction of the rotating shaft 15. Note that the magnet 371 may have a configuration in which a plurality of N poles and S poles are alternately and continuously arranged. For example, a set of four north poles and four south poles (total eight poles) may be arranged in the rotational direction.

  In the present embodiment, the height of the magnet 371 is set in accordance with the height of the slit 361. Further, the lower end of the magnet 371 is located above the lower end of the filling groove 353.

  The resistance portion 319 inserted in the filling groove 353 of the magnetic fluid tank 352 is fixed to the rotation shaft 15 of the third embodiment. The resistance portion 319 is formed in a cylindrical shape in accordance with the shape of the filling groove 353. When the rotating shaft 15 rotates, the resistance portion 319 also rotates integrally in the filling groove 353, and receives resistance according to the viscosity of the magnetorheological fluid 351. The resistance portion 319 is not limited to a cylindrical shape, and a ring portion that rotates integrally with the rotation shaft 15 and a plurality of leg members that extend downward from the ring portion and are inserted into the filling groove 353 And may be provided.

  Also in the reaction unit 310 of the third embodiment described above, when the rotation shaft 15 rotates, the magnet 371 rotates via the rotation member 20, and the orientation of the magnet 371 and the positional relationship of the slit 361 change. In other words, the relationship between the slit 361 as the magnetic passage portion and the direction (rotational position) of the magnet 371 relatively changes. Also in this configuration, by adjusting the position of the slit 361, the magnetic field acting on the magnetorheological fluid 51 of the magnetic fluid portion 350 can be strengthened or weakened at a specific position, and attenuation applied to the door 1 The force can be adjusted appropriately according to the position of the door 1.

  Further, in the configuration of the third embodiment, the amount of the magnetorheological fluid can be reduced as compared with the configurations of the first embodiment and the second embodiment, and reduction in manufacturing cost can also be achieved.

Fourth Embodiment
FIG. 6 is a view showing a magnetic field shield 460 of the fourth embodiment. Next, an example of the shape of the slit 461 formed in the magnetic field shield 460 will be described. The magnetic field shield 460 shown in FIG. 4 may be applied to those fixed to the main body 6 as in the first embodiment or the third embodiment, or in the inside of the main body 6 as in the second embodiment. You may apply to what is rotated.

  The slits 461 formed in the magnetic field shield 460 are formed to have different sizes (opening areas) in the circumferential direction. Also in the fourth embodiment, a portion other than the portion where the slits 461 are formed in the circumferential surface of the magnetic field shield 460 functions as the magnetic shielding portion 462.

  In the present embodiment, two substantially triangular slits 461 are formed to face each other. Thus, the area (area) through which the magnetic field passes is different depending on the rotational position of the rotation shaft 15.

  That is, the slit 461 on one side of the two slits 461 as the magnetic passage portion of the fourth embodiment is formed to be larger as its area advances in the rotational direction, and the slit 461 on the other side is formed smaller as it proceeds in the rotational direction. Ru. That is, the rotation shaft 15 is formed relatively large at a position where the drag is desired to be strong, and relatively small at a position where the drag is desired to be reduced.

  As a result, it is possible to control the reaction force applied to the rotation shaft 15 more accurately by causing the magnetic field to act strongly on the magnetorheological fluid 51, 351 at a predetermined rotational position or causing the magnetic field to weakly act.

  In the fourth embodiment, the magnetic field is adjusted by changing the size of the slit 461 in the rotational direction, but the magnetic field to be applied to the magnetorheological fluid by changing the thickness of the magnetic field shield in the rotational direction is used. It is good also as composition adjusted.

  As mentioned above, although the example which applied this invention to the door closer 5 of the door 1 was demonstrated by 1st Embodiment to 4th Embodiment, it is set as the structure which incorporates the reaction part 10,210,310 of the said embodiment in the inside of the hinge 11. It can also be done. FIG. 7 is a view showing an example in which the damper device of the present embodiment is applied to the hinge 11.

  As shown in FIG. 7, the hinge 11 has an upper hinge 35 on the rotating side, a lower hinge 40 on the fixed side, and a receiving ring 30 disposed between the upper hinge 35 and the lower hinge 40. Prepare.

  The upper hinge 35 includes an upper plate 36 fixed to the door 1 and an upper shaft 37 rotating with the rotation of the door 1. The upper shaft 37 is provided with a rotation shaft 15 that extends downward along the center of rotation and rotates integrally with the upper shaft 37.

  The lower hinge 40 includes a lower plate 41 fixed to the frame 2 and a lower shaft 42 rotatably supporting the rotating shaft 15.

  The receiving ring 30 is disposed between the lower end surface of the upper shaft 37 and the upper end surface of the lower shaft 42. The rotating shaft 15 is connected to the lower shaft 42 through the through hole 31 at the center of the receiving ring 30. Since the lower hinge 40 receives the weight of the upper hinge 35 via the receiving ring 30, the weight of the upper hinge 35 makes the rotary shaft 25 less susceptible to the influence.

  In the present embodiment, the rotation shaft 15 is connected to the same configuration as the drag portion 10 (210, 310) described in the above embodiment. Thus, the present invention can be applied not only to the door closer 5 but also to the hinge 11.

  As mentioned above, although the preferable embodiment of this invention was described, this invention is not restrict | limited to the above-mentioned embodiment, It can change suitably.

  In the above embodiment, the resistance according to the viscosity of the magnetorheological fluid 51 is transmitted to the rotation shaft 15 through the stirring fin 19 of the first embodiment and the resistance portion 319 of the third embodiment. The magnetorheological fluid 51 may be arranged to be in contact with

  In the above embodiment, the magnetically permeable portion is formed by the slit, but the portion of the slit may be formed of a material through which magnetism passes. Also, the magnetic shield may not be completely shielded from the magnetism. The magnetic shielding portion relatively shields the magnetism, and the magnetic passing portion relatively transmits the magnetism, and various materials can be combined to constitute a magnetic field shield.

  In the above embodiments, the door has been described as an example of the movable body, but various dampers for controlling the moving speed of the movable body, such as the hinge of the window rotating in a predetermined range and the rotation mechanism of the bar for intrusion prevention The present invention can be applied to an apparatus.

1 Door (mobile, door)
4 Joiner 5 Door Closer (Damper Device)
11 Hinge (damper device)
15 Rotary shaft 19 Stirring fin (resistance part)
20, 220, 320 Rotating member 50, 350 Magnetic fluid part 51, 260, 351 Magnetorheological fluid (magnetic fluid)
60, 360, 460 Magnetic field shield 61, 261, 361, 461 Slit (magnetic passage part)
62, 262, 362, 462 Magnetic shielding part 71, 71a-d, 271, 371 Magnet 319 resistance part

Claims (3)

A damper device for controlling the moving speed of a moving body, comprising:
A rotating shaft that rotates in conjunction with the movement of the movable body;
A magnetic fluid portion which is filled with a magnetic fluid having a property of changing viscosity according to a magnetic field, and in which a rotating shaft or a resistance portion driven by rotation of the rotating shaft is rotatably inserted;
A magnet that increases the viscosity of the magnetic fluid by a magnetic field;
A magnetic field shield, which is disposed between the magnetic fluid portion and the magnet, and in which a magnetic shielding portion that shields magnetism and a magnetic passing portion that transmits magnetism are formed side by side in the rotational direction of the rotation shaft;
A rotating member that rotates in conjunction with the rotating shaft and changes the positional relationship between the magnet and the magnetic passing portion in a rotating direction;
Damper device. The magnetic passage portion is
The damper device according to claim 1, wherein the area or the thickness is formed to be larger or smaller as it proceeds in the rotational direction. A fitting comprising a door attached to an opening of a building and a damper device for controlling the moving speed of the door,
The damper device
A rotating shaft that rotates in conjunction with the movement of the door;
A magnetic fluid portion which is filled with a magnetic fluid having a property of changing viscosity according to a magnetic field, and in which a rotating shaft or a resistance portion driven by rotation of the rotating shaft is rotatably inserted;
A magnet that increases the viscosity of the magnetic fluid by a magnetic field;
A magnetic field shield, which is disposed between the magnetic fluid portion and the magnet, and in which a magnetic shielding portion that shields magnetism and a magnetic passing portion that transmits magnetism are formed side by side in the rotational direction of the rotation shaft;
A rotating member that rotates in conjunction with the rotating shaft and changes the positional relationship between the magnet and the magnetic passing portion in a rotating direction;
Fittings equipped with.

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